Dynamic visualization and control of photochemical reaction fields based on near-field spectroscopic imaging

2010 Fiscal Year Final Research Report

• Project Area: Strong Photons-Molecules Coupling Fields for Chemical Reactions
• Project/Area Number: 19049015
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Institute for Molecular Science
• Principal Investigator: OKAMOTO Hiromi Institute for Molecular Science, 光分子科学研究領域, 教授 (20185482)
• Co-Investigator(Kenkyū-buntansha): IMURA Kohei 早稲田大学, 理工学術院, 准教授 (80342632) ; KITAJIMA Masahiro 防衛大学校, 応用科学群, 教授 (00343830) ; NARUSHIMA Tetsuya 分子科学研究所, 光分子科学研究領域, 助教 (50447314)
• Research Collaborator: HARADA Yosuke 分子科学研究所, 光分子科学研究領域, 博士研究員
• Project Period (FY): 2007 – 2010
• Keywords: ナノ材料 / 走査プローブ顕微鏡 / 近接場 / プラズモン / 金属ナノ構造

Research Abstract

Optical fields can be confined and enhanced in a nanometric space by the use of metal nanostructures, which potentially create novel photochemical reaction fields and photoenergy conversion systems. As a basis toward achieving that, we visualized nanoscale optical field distributions in various metal nanostructures to reveal the optical characteristics, using a near-field optical microscope that enables a spatial resolution far beyond that of a conventional optical microscope. We obtained guidelines for designing nanostructures that efficiently generate and control enhanced localized optical fields.

Research Products

• [Journal Article] Anomalous light transmission from plasmonic capped nano-apertures (2011)
  • Author(s): Kohei Imura, Kosei Ueno, Hiroaki Misawa, Hiromi Okamoto
  • Journal Title: Nano Lett. 11 Pages: 960-965
  • Peer Reviewed
• [Journal Article] Confined optical fields in nanovoid chain structures directly visualized by near-field optical imaging (2011)
  • Author(s): Su Il Kim, Kohei Imura, Sehun Kim, Hiromi Okamoto
  • Journal Title: J.Phys.Chem.C 115 Pages: 1548-1555
  • Peer Reviewed
• [Journal Article] Nonlinear optical effects in trapping nanoparticles with femtosecond pulses (2010)
  • Author(s): Yuqiang Jiang, Tetsuya Narushima, Hiromi Okamoto
  • Journal Title: Nature Phys. 6 Pages: 1005-1009
  • Peer Reviewed
• [Journal Article] Near-field optical imaging of enhanced electric fields and plasmon waves in metal nanostructures (2009)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Journal Title: Prog.Surf.Sci. 84 Pages: 199-229
  • Peer Reviewed
• [Journal Article] Two-photon imaging of localized optical fields in the vicinity of silver nanowires using a scanning near-field optical microscope (2009)
  • Author(s): Kohei Imura, Young Chae Kim, Seongyong Kim, Dae Hong Jeong, Hiromi Okamoto
  • Journal Title: Phys.Chem.Chem.Phys. 11 Pages: 5876-5881
  • Peer Reviewed
• [Journal Article] Bioimaging with two-photon-induced luminescence from triangular nanoplates and nanoparticle aggregates of gold (2009)
  • Author(s): Yuqiang Jiang, Noriko Nishizawa Horimoto, Kohei Imura, Hiromi Okamoto, Ko Matsui, Ryuichi Shigemoto
  • Journal Title: Adv.Mater. 21 Pages: 2309-2313
  • Peer Reviewed
• [Journal Article] Near-field study on correlation of localized electric field and nanostructures in monolayer assembly of gold nanoparticles (2008)
  • Author(s): Toru Shimada, Kohei Imura, Mohammad Kamal Hossain, Hiromi Okamoto, Masahiro Kitajima
  • Journal Title: J.Phys.Chem.C 112 Pages: 4033-4035
  • Peer Reviewed
• [Journal Article] Ultrafast photoinduced changes of eigenfunctions of localized plasmon modes in gold nanorods (2008)
  • Author(s): Kohei Imura, Hiromi Okamoto
  • Journal Title: Phys.Rev.B 77 Pages: 041401(R)(4)
  • Peer Reviewed
• [Presentation] Near-field studies of plasmonic waves and field enhancements (2010)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: Pacifichem 2010, Symposium 171 "The Nanostructure-Enhanced Photochemical Reactions"
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2010-12-15
• [Presentation] Near-field imaging of plasmonic waves and enhanced optical fields (2010)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: The 6th International Workshop on Nano-scale Spectroscopy and Nanotechnology
  • Place of Presentation: Kobe, Japan
  • Year and Date: 2010-10-26
• [Presentation] Near-Field Optical Imaging of Enhanced Photon Fields and Plasmon Waves in Metal Nanostructures (2010)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: Progress in Electromagnetics Research Symposium (PIERS)
  • Place of Presentation: Cambridge, USA
  • Year and Date: 2010-07-05
• [Presentation] Visualization of plasmonic wavefunctions and optical fields using near-field optical microscope (2009)
  • Author(s): Kohei Imura, Hiromi Okamoto
  • Organizer: The 7th Asia-Pacific Conference on Near-Field Optics
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2009-11-25
• [Presentation] Nanoscale near-field imaging of enhanced optical fields in metal structures (2008)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: XXII IUPAC Symposium on Photochemistry
  • Place of Presentation: Gothenburg, Sweden
  • Year and Date: 2008-07-29
• [Presentation] Near-field imaging of enhanced optical fields and plasmon waves (2008)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: The OSA Topical Conference on Nanophotonics 2008
  • Place of Presentation: Nanjing, China
  • Year and Date: 2008-05-28
• [Presentation] Near-field optical imaging of nanoscale optical fields and plasmon waves (2007)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Organizer: 14th International Colloquium on Scanning Probe Microscopy (ICSPM14)
  • Place of Presentation: Atagawa, Japan
  • Year and Date: 2007-12-06
• [Book] Advances in Multi-Photon Processes and Spectroscopy, Vol.20 (2011)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Total Pages: 176-209
  • Publisher: World Scientific
• [Book] プラズモンナノ材料の最新技術 (2009)
  • Author(s): 岡本裕巳
  • Total Pages: 105-115
  • Publisher: シーエムシー出版
• [Book] Molecular Nano Dynamics, Volume I : Spectroscopic Methods and Nanostructures (2009)
  • Author(s): Hiromi Okamoto, Kohei Imura
  • Total Pages: 39-54
  • Publisher: Wiley-VCH
• [Remarks] ホームページにおける研究内容紹介
  • URL: http://www.ims.ac.jp/topics/2010/101012.html
• [Remarks]
  • URL: http://www.ims.ac.jp/topics/2010/110201.html
• [Remarks] 自然科学研究機構岡崎3機関広報誌(一般市民向け)における研究内容紹介
  • URL: http://www.orion.ac.jp/pbl/okazaki/pdfdata/OKAZAKI-36.pdf
• [Remarks] 新聞・一般誌 報道発表
• [Remarks] 「超短パルスレーザーで新たな光ピンセット」科学新聞(2010年10月29日)
• [Remarks] 「ナノの穴にフタ透過する光強くなる」日刊工業新聞(2011年2月2日)(以下,同一内容)日経産業新聞(2011年2月2日)化学工業日報(2011年2月2日)中部経済新聞(2011年2月2日,3月22日)科学新聞(2011年2月11日)New Scientist(英国,2011年2月19日号)日経サイエンス(2011年5月号)